Submission #253679

#	Time	Username	Problem	Language	Result	Execution time	Memory
253679		Vimmer	Savez (COCI15_savez)	C++14	120 / 120	940 ms	17272 KiB

savez

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-O3")
#pragma GCC optimize("Ofast")
//#pragma GCC optimize("fast-math")
//#pragma GCC optimize("no-stack-protector")

#define F first
#define S second
#define sz(x) int(x.size())
#define pb push_back
#define pf push_front
#define N 2000050
#define M ll(1e9 + 7)
#define inf 1e9 + 1e9

using namespace std;
using namespace __gnu_pbds;

typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef short int si;
typedef array <ll, 3> a3;
typedef array <ll, 4> a4;

//typedef tree <ll, null_type, less_equal<ll>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;


gp_hash_table <int, int> mp;

ll pw[N];

ll mult(ll x, ll y) {return (x * y) % M;}

ll sm(ll x, ll y) {return (x + y) % M;}

int main()
{
    //freopen("input.txt", "r", stdin); //freopen("output4.txt", "w", stdout);

    ios_base::sync_with_stdio(0); istream::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    pw[0] = 1;

    for (register int i = 1; i < N; i++) pw[i] = mult(pw[i - 1], 31);

    int n;

    cin >> n;

    int ans = 0;

    for (int i = 0; i < n; i++)
    {
        string s;

        cin >> s;

        deque <char> l, r; l.clear(); r.clear();

        int val = 1;

        int hsh = 0;

        for (int j = 0; j < sz(s); j++)
        {
            l.pb(s[j]);

            r.pf(s[sz(s) - j - 1]);

            hsh = sm(hsh, mult(s[j] - 'A' + 1, pw[j]));

            if (l == r) val = max(val, mp[hsh] + 1);

        }

        mp[hsh] = val;

        ans = max(ans, val);
    }

    cout << ans << endl;
}

• Subtask 1: 12 / 12
• Subtask 2: 12 / 12
• Subtask 3: 12 / 12
• Subtask 4: 12 / 12
• Subtask 5: 12 / 12
• Subtask 6: 12 / 12
• Subtask 7: 12 / 12
• Subtask 8: 12 / 12
• Subtask 9: 12 / 12
• Subtask 10: 12 / 12